Self-locking drive collar



Nov. 22, 1927: 1,650,573

R. R. SEARLES SELF LOCKING DRIVE COLLAR Filed Feb. 7, 1925 INVENTOR ATTORNEY-S.

Patented Nov. 22, 1927.

ree. s ir 1 :nAYMo vn :a. snantns. or entrain; CQNNECTICUTflASSIQNQR TO THE arms BEARING COMPANY, or new BRITAIN, coitnncricurn oonronarrongor con- ,-SELZE-LOCKI1-IG DRIVE cornea Q Application filed February 7 1925. seriain naesa particularly, though not exclusively, adapted 5 for locking the innerbearingring ofan anti- 1 friction bearing to afshaftn It is the rincipalobjfiCt of to provide a simplefmeans for locking a col- "lar on a shaft which can be manufactured at relatively small cost and which will hold the collar, securely in place against rotation.

In the" clr'awings which show" for illus invention:

Fig.1 isa.fragmentaryview of a shaft ancl lockingmeans illustrating one embodiment of the invention;

. trative purposes only,-preferred forms of the in Fig. 1, a part beingbroken; away a .Figl 31s aviksw'similar to Fig. land illus- .Fi 5 isa view to Fig. 3 and illus}.

' crates stillanothermodification.

6 indicates a shaft to which a collar is to be secured. 78 designate parts of the shaft which are eccentric to each other. 9 designates a collar which in the form shown is an inner ring of a ball bearing, this collar heing seated upon the part 7 of the shaft. The collar 9 is locked to the shaft by means of a second ring or collar 10 on the eccentric portion 8 of the shaft, as will be later described. In the form shown, the ring 9 has a counter bored portion 11 which is eccentric tothe bore which fits upon the shaft portion v7 as will be clear from Figs. 1 and 2. The collar 10 is provided with a projecting lug portion 12 which fits within the counterbore 11 of the ring 9 and this projection is preferably concentric with the bore through the collar 10. a e

It will now be clear that, with the collars 9 and 10 in engagement with eachother,'as

shown in Figs. 1- and 2, if the collars are rotated slightly, relativelyto each other, the

eccentric formation of-the shaft and of the interfitting parts on the collars will cause the two collars to bind or lock tightly to each other and will cause the two rings or collars to be tightly wedged and held to their respective shaftportions.

In order to preclude the possibility of the collars slipping on the shaftportionsl before the same become tlghtly lockedylmay secure or anchor one of the collars to the shaftrpor tionby suitable means such asa set screw 13.

I k Thesetf screw-also. performs the additional the nventlon function of positioning the collar l Qilongitudinallyon the shaft portion8 and by this means the ring-9 is preventedfrqm:IIIOMing end'wiseon the shaft inoneldirection. It should be understood that the-setfiscrew 13 "is not what causes the ring 9,,to;be held or wedged on the shaft, since the .iweclging or holding action is caused by the eccentric interfitting parts between the two collars and shaft and the set screw 13 is more in the w p 5 nature OI a precautionary measure. If de- Fig. 2 IS tLILQIld VM-BW of the device shown sired, ineanssuch as a collar or fiange l t may be provided on y the shaft so as to prevent movement of thering 9in theopposite direc 4 v 0 y v I tion or toward theleftas v iewed in, Fig. 1. F g. ais asect onal .vie w taken substan- In the foim of the. invention-shown in st- 3 d 4 h ecc nt ctea me-1 the shaft are. formed by cutting a ggroove. 15

therein, which groove is deeper at onefside than at theother, in other words, the groove the shaft. The ring 9 in this instance fits on the main portion ofv the shaft and has a,

counterbored portion 16 which fits over the collar 17 positioned in the eccentric groove 15. One of the collars is eccentrically formed and in the modification shown in is made eccentric to the bore through the ring and the collar 17 may in this instance haveits inner and outer surfacesconcentric.

shaft easy.

, It will be clear that with this form of the invention, as with the form last described, it is only necessary to rotate the collars relatively to each other slightly in order to cause both collars to lock to the shaft and to each other.

With the parts proportioned as disclosed in Fig. 3. the ringor collar 17 will prevent sliding of the ring 9 on the shaft in one direction. If desired, other means may be provided for positioning the collar 9 on the 115 is cut eccentrically to the outer surface of.

Figs. 3 and 4, the counter bored portion 16 v groove so that endwise movement of the ring 9 toward the right as viewed in Fig. 3 will be prevented.

In'the modification disclosed in Fig. 5,

the shaft has an eecentrically formed groove 20, which in this case is made relatively wider than would be necessary for a s ngle collar fitting therein, for a purpose to be described. The collar 9! i fitted on the shaft 6, while the collar 21, which'may be a split wire ring, fits in the "eccentric groove 20.

The interfittingparts between the rings 9 and 21 may be e'ccentrically formed and I prefer to turn out an eccentric counterbore 22 in the ring'Ql, which counterbore fits over the collar-21, as llliilllGlZWO prev ously described forms. Itwill be obvious that a sh ht relative rotation between the rings 9" an 21 will cause the same to be tightly wedged orheldto the shaft and to each other.

r I If desired, endwise movement of the ring '9" toward the left, as viewed 111 Fig. 5,

may be prevented by suitable means such as the flangeorfixed collar 23 on the shaft. An endwise positioning collar which may he in the form'of a splitring 21: may be seated in therelatively wide groove 20 and may abut the locking collar 21 so as to hold the same, and consequently prevent endwise movement of the ring 9" toward the right, as viewed in Fig. 5.

In each of the forms shown, the shaft is provided with two eccentric portions and a collar is seated on each of these portions. While I have described the lockingfunction as being performed by a slight relative rotation between the two collars, ineach instance itwill, of course, be understood that the locking function would he performed equally well by holding one of the collars and r0 tating the shaft, and I wish to cover such an alternative action.

While the invention'has been described in some detail and several possible embodiments shown, I do notwish to be confined to the forms illustrated, since other modifications may be made within the see e of the invention as defined inthe appen ed claim I claim: 7 I

I In a device of the character. described, a shaft having an eccentric seat formed di rectly thereon, a ring fitting on said shaft and having a eounterbored portion at one end eccentric to the bore therethrough, said eounterbored portion surrounding said eccentrically formed seat on said shaft, a second ring on said eccentrieallyformed seat onsaid shaft and extending within and fitting said eounterbored portion, and means on the shaft engaging said first mentioned ring at the end opposite said eounterbored portion for. maintaining the eounterbored portion around said second ring. 4

' RAYMOND R. S ARLES. 

